The IEC 318 Ear Simulator Type RA0039 is an ear simulator with an input impedance closely resembling that of an average human ear. When the RA0039 is coupled to a sound source, the impedance will load the sound source similar to the loading caused by the human ear.

The RA0039 meets the requirements of IEC 60318-1:1998 Electroacoustics - "Simulators of human head and ear - Part 1: Ear simulator for the calibration of supra-aural earphones".

The RA0039 is measured and calibrated according to the ITU-T Recommendation P.57 (08/96) ”Series P: Telephone transmission quality, Objective measuring apparatus: Artificial ears”.

The RA0039 is also part of the G.R.A.S. Artificial Ears Type 43AA and Type 43AD.

Specifications Type RA0039
Standards: IEC 60318 (prev. IEC 318) and ITU-T Recommendations P.57 (08/96)
Frequency range: 100 Hz - 4 kHz
Dimensions: Height:19.8 mm
Diameter: 60 mm
Weight: 137 g
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